GB2042006A - Treating textile materials - Google Patents
Treating textile materials Download PDFInfo
- Publication number
- GB2042006A GB2042006A GB7842837A GB7842837A GB2042006A GB 2042006 A GB2042006 A GB 2042006A GB 7842837 A GB7842837 A GB 7842837A GB 7842837 A GB7842837 A GB 7842837A GB 2042006 A GB2042006 A GB 2042006A
- Authority
- GB
- United Kingdom
- Prior art keywords
- textile material
- calender
- polyolefine
- polypropylene
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 62
- 239000004753 textile Substances 0.000 title claims abstract description 52
- 229920000098 polyolefin Polymers 0.000 claims abstract description 30
- 239000012535 impurity Substances 0.000 claims abstract description 25
- -1 polypropylene Polymers 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000004743 Polypropylene Substances 0.000 claims abstract description 22
- 229920001155 polypropylene Polymers 0.000 claims abstract description 22
- 239000004744 fabric Substances 0.000 claims abstract description 21
- 238000009877 rendering Methods 0.000 claims abstract description 7
- 210000002268 wool Anatomy 0.000 claims description 13
- 239000000835 fiber Substances 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 238000004043 dyeing Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C7/00—Heating or cooling textile fabrics
- D06C7/04—Carbonising or oxidising
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C15/00—Calendering, pressing, ironing, glossing or glazing textile fabrics
- D06C15/06—Calendering, pressing, ironing, glossing or glazing textile fabrics between rollers and co-operating moving surfaces formed of flexible material, e.g. bands
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C29/00—Finishing or dressing, of textile fabrics, not provided for in the preceding groups
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
A method of rendering invisible polyolefine impurities present in a textile material by passing the textile material around a heated calender 7 at a temperature and for a time sufficient to render the impurities invisible. A dyed woollen fabric 3 with split polypropylene film specks is fed from a cuttle 5 or a batch roller around a preheater 8 comprising a heated steel drum 8 and past infra-red preheaters 9 to a heated blanket calender 7 which is heated to 200-220 DEG C, the contact time being 10 to 20 seconds. <IMAGE>
Description
SPECIFICATION
Treatment of textile materials
This invention relates to the treatment of textile materials and in particular to the treatment of textile materials containing unwanted polyolefine film or fibre.
The presence of polyolefine material in textile materials is a serious problem in the textile industry. For instance, wool is often made up into bales and transported or stored in sacks made of polypropylene. Frequently small pieces of the split film polypropylene fibre become mixed with the wool, for instance, if the sack is damaged by a hook. The polypropylene cannot be seen in the wool until the wool is dyed. It is not possible to dye the polypropylene fibre impurities by any of the conventional aqueous dyeing methods. It is possible to dye the polypropylene bits in textile material by means of the process described and claimed in our patents Nos.
1,432,197 and 1,512,368, and this will be the normal procedure where the textile material contains both polyolefine impurities and also other synthetic impurities such as polyesters.
We have now discovered that polyolefine impurities, whether present as a sole impurity or in addition to other impurities, may be rendered invisible in a surprisingly simple way. Thus the present invention provides a method of rendering invisible surface polyolefine bits in textile material comprising passing the textile material round a heated calender at a temperature and for a time such that the polyolefine is no longer visible on the surface of the textile material.
This treatment may be carried out either before or after the textile material is dyed and the aim of the treatment is to heat the surface of the textile material by means of the calender so that, in the dyed textile material, the polyolefine cannot be seen. In the case of polyolefine split film, the light reflecting properties are such that a very small amount of such impurity in the textile material is very prominent and spoils the appearance of the material. We have found that by subjecting the material to the simple heat treatment on a calender the polyolefine may be removed at least to the extent where it is no longer visible. It may be that the polyolefine is not removed altogether from the surface but the nature of the original fibres or split films is changed to an extent that the impurity is not visible in the dyed material.
The temperature and time conditions will vary according to the nature of the textile material and the particular impurities which are present. Split films of polypropylene tend to begin shrinking at about 1 50 C and to melt somewhere around 1 70 C and a temperature in this region may be a minimum which must be reached at the surface of the material.
Typically split films of polypropylene can be removed from wool fabric by running the fabric directly against a calender heated to about 200 to 220"C, the contact time being from about 10 to 20 seconds. Preferably the calender should be heated to a temperature of at least 150"C and an appropriate contact time may be easily discovered by trials at different contact times.
Where the impurity is polyethylene the temperature required may be lower than in the case of polypropylene. For instance, a minimum temperature may be around 110"C although a preferred temperature may be somewhat higher than this.
The drawing shows diagramatically the operation of a method in accordance with the present invention, by way of example only.
Referring to the drawing, a dyed woollen fabric 3, containing specks of polypropylene impurities in the form of split films, is fed from a "long cuttle" 5 or, alternatively, from rollers on which the cloth is batched. As shown, cloth 3 is fed to blanket calender 7 via first and second pre-heaters 8 and 9 respectively. First pre-heater 8 is in the form of a single steel-heated drum whereas the second pre-heaters 9 are infra-red heaters. On leaving calender 7, cloth 3 is fed by a series of guide rollers to a roller 20 on which it is batched.
Between first pre-heater 8 and second preheater 9 the cloth 3 is joined by continuous blanket 21. Blanket 21 is then fed to blanket calender 7 with cloth 3. On leaving blanket calender 7 the blanket 21 is fed by a series of guide rollers back to calender 7 as shown in the drawing.
The arrangement of the apparatus is such that blanket calender 7 is surrounded over a substantial portion of its periphery by two layers of material, an inner layer of the textile material being treated and an outer layer of the blanket. In an alternative embodiment, the blanket may be omitted.
The heat applied by calender 7 to the contacting surface of cloth 3 and the time of contact of the cloth on the calender are such that the specks of polypropylene are removed from the surface of the textile material. Thus after the treatment these specks are not visible. In a case where the textile material is wool, the calender was heated to a temperature of from 200 to 220"C and the contact time was between 10 and 20 seconds.
CLAIMS (31 Oct 1978)
1. A method of rendering invisible surface polyolefine bits in textile material comprising passing the textile material round a heated calender at a temperature and for a time such that the polyolefine is no longer visible on the surface of the textile material.
2. A method according to claim 1 wherein
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (1)
- **WARNING** start of CLMS field may overlap end of DESC **.SPECIFICATION Treatment of textile materials This invention relates to the treatment of textile materials and in particular to the treatment of textile materials containing unwanted polyolefine film or fibre.The presence of polyolefine material in textile materials is a serious problem in the textile industry. For instance, wool is often made up into bales and transported or stored in sacks made of polypropylene. Frequently small pieces of the split film polypropylene fibre become mixed with the wool, for instance, if the sack is damaged by a hook. The polypropylene cannot be seen in the wool until the wool is dyed. It is not possible to dye the polypropylene fibre impurities by any of the conventional aqueous dyeing methods. It is possible to dye the polypropylene bits in textile material by means of the process described and claimed in our patents Nos.1,432,197 and 1,512,368, and this will be the normal procedure where the textile material contains both polyolefine impurities and also other synthetic impurities such as polyesters.We have now discovered that polyolefine impurities, whether present as a sole impurity or in addition to other impurities, may be rendered invisible in a surprisingly simple way. Thus the present invention provides a method of rendering invisible surface polyolefine bits in textile material comprising passing the textile material round a heated calender at a temperature and for a time such that the polyolefine is no longer visible on the surface of the textile material.This treatment may be carried out either before or after the textile material is dyed and the aim of the treatment is to heat the surface of the textile material by means of the calender so that, in the dyed textile material, the polyolefine cannot be seen. In the case of polyolefine split film, the light reflecting properties are such that a very small amount of such impurity in the textile material is very prominent and spoils the appearance of the material. We have found that by subjecting the material to the simple heat treatment on a calender the polyolefine may be removed at least to the extent where it is no longer visible. It may be that the polyolefine is not removed altogether from the surface but the nature of the original fibres or split films is changed to an extent that the impurity is not visible in the dyed material.The temperature and time conditions will vary according to the nature of the textile material and the particular impurities which are present. Split films of polypropylene tend to begin shrinking at about 1 50 C and to melt somewhere around 1 70 C and a temperature in this region may be a minimum which must be reached at the surface of the material.Typically split films of polypropylene can be removed from wool fabric by running the fabric directly against a calender heated to about 200 to 220"C, the contact time being from about 10 to 20 seconds. Preferably the calender should be heated to a temperature of at least 150"C and an appropriate contact time may be easily discovered by trials at different contact times.Where the impurity is polyethylene the temperature required may be lower than in the case of polypropylene. For instance, a minimum temperature may be around 110"C although a preferred temperature may be somewhat higher than this.The drawing shows diagramatically the operation of a method in accordance with the present invention, by way of example only.Referring to the drawing, a dyed woollen fabric 3, containing specks of polypropylene impurities in the form of split films, is fed from a "long cuttle" 5 or, alternatively, from rollers on which the cloth is batched. As shown, cloth 3 is fed to blanket calender 7 via first and second pre-heaters 8 and 9 respectively. First pre-heater 8 is in the form of a single steel-heated drum whereas the second pre-heaters 9 are infra-red heaters. On leaving calender 7, cloth 3 is fed by a series of guide rollers to a roller 20 on which it is batched.Between first pre-heater 8 and second preheater 9 the cloth 3 is joined by continuous blanket 21. Blanket 21 is then fed to blanket calender 7 with cloth 3. On leaving blanket calender 7 the blanket 21 is fed by a series of guide rollers back to calender 7 as shown in the drawing.The arrangement of the apparatus is such that blanket calender 7 is surrounded over a substantial portion of its periphery by two layers of material, an inner layer of the textile material being treated and an outer layer of the blanket. In an alternative embodiment, the blanket may be omitted.The heat applied by calender 7 to the contacting surface of cloth 3 and the time of contact of the cloth on the calender are such that the specks of polypropylene are removed from the surface of the textile material. Thus after the treatment these specks are not visible. In a case where the textile material is wool, the calender was heated to a temperature of from 200 to 220"C and the contact time was between 10 and 20 seconds.CLAIMS (31 Oct 1978)1. A method of rendering invisible surface polyolefine bits in textile material comprising passing the textile material round a heated calender at a temperature and for a time such that the polyolefine is no longer visible on the surface of the textile material.2. A method according to claim 1 wherein the polyolefine is polypropylene.3. A method according to claim 2 wherein the textile material is passed round a calender heated to from 200 to 220"C for a time of from 10 to 20 seconds.4. A method according to claim 1 wherein the polyolefine is polyethylene.5. A method according to claim 4 wherein the temperature is at least 110 C.6. A method according to any of the preceding claims wherein the textile material is made wholly or partly or wool.7. A method according to claim 1 and substantially as herein described.8. A method of rendering invisible surface polyolefine bits in textile material substantially as described herein with reference to the accompanying drawing.9. Textile material whenever treated by a method according to any of the preceding claims.CLAIMS (29 Feb 1980)1. A method of rendering invisible surface polyolefine bits present as impurities in textile material comprising passing the textile material round a heated calender at a temperature and for a time such that the polyolefine is no longer visible on the surface of the textile material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7842837A GB2042006B (en) | 1978-11-01 | 1978-11-01 | Treating textile materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7842837A GB2042006B (en) | 1978-11-01 | 1978-11-01 | Treating textile materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2042006A true GB2042006A (en) | 1980-09-17 |
| GB2042006B GB2042006B (en) | 1983-01-06 |
Family
ID=10500740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7842837A Expired GB2042006B (en) | 1978-11-01 | 1978-11-01 | Treating textile materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2042006B (en) |
-
1978
- 1978-11-01 GB GB7842837A patent/GB2042006B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB2042006B (en) | 1983-01-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |